Conbraco 18C-511-3-150 Valve

The Conbraco 18C-511-3-150 is a high-capacity temperature and pressure relief valve engineered for heavy-duty commercial and industrial water heaters. This T&P relief valve features a 3/4" MNPT inlet and a 3/4" FNPT outlet, facilitating a straight-line installation for high-demand hydronic systems. With a factory-set 150 PSI relief pressure and a 210°F temperature setting, it provides critical over-pressure and over-temperature protection. The unit is equipped with a 3" probe length, ensuring accurate sensing of internal vessel conditions to prevent hazardous build-up. Rated for a 1,912,000 BTU capacity, this Apollo 18C series valve utilizes a silicone seat and a stainless steel spring for reliable reseating and long-term corrosion resistance. It is vital for contractors to ensure the BTU discharge capacity of the valve exceeds the heat input of the water heater to maintain system safety and compliance with ASME Section IV requirements.

• High BTU Rating: Offers a 1,912,000 BTU/HR capacity suitable for large commercial boilers and water storage tanks.
• Precise Sensing: The 3-inch coated immersion element ensures rapid response to thermal expansion and overheating.
• Durable Construction: Built with a bronze body and corrosion-resistant internal components for durability in harsh water conditions.
• Standardized Fit: Features a 3/4 inch NPT orientation designed for industry-standard plumbing and manifold configurations.

Common Questions

Is the 18C-511-3-150 suitable for potable water systems?
Yes, this valve is designed specifically for hot water supply systems and water heaters, meeting necessary safety standards for potable water applications.

What is the maximum heating capacity this valve can handle?
This specific model is rated for equipment with a heat input up to 1,912,000 BTU/HR. Always verify your heater's nameplate before installation.

How does the 3-inch probe impact installation?
The 3-inch probe length is optimal for standard tank domestic hot water heaters, ensuring the sensing element is positioned in the hottest water within the top six inches of the tank.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.